建造MiniBooNE近探测器的意向书：BooNE
A Letter of Intent to Build a MiniBooNE Near Detector: BooNE
摘要：
在$\sim 1$ eV $^2$尺度下，中微子和反中微子振荡之间的差异有越来越多的证据。MiniBooNE实验在中微子模式下观测到了一个无法解释的低能类电子事件，这可能是由于中性电流辐射相互作用、无菌中微子衰变或涉及无菌中微子的中微子振荡，这可能与LSND信号有关。然而，到目前为止，在反中微子模式的低能量下，没有观察到过量的类电子事件（$-0.5 \pm 7.8 \pm 8.7$）。此外，全球3+1和3+2不育中微子符合世界中微子和反中微子数据表明中微子和反中微子之间的差异显着（$\sin^22θ_{μμ} \sim 35%$）$\bar ν_μ$消失。为了测试低能过剩是否是由于中微子振荡以及$ν_μ$和$\bar ν_μ$消失之间是否存在差异，我们建议在距离助推中微子束（BNB）生产目标$\sim 200$ m处建造第二个MiniBooNE探测器（或将现有MiniBooNE探测器移动到）。对于不同距离的相同探测器，当取两个探测器中事件的比率时，大部分系统误差将被抵消，因为中微子通量随着$1/r^2$变化到可计算的近似值。这将允许对$ν_e$和$\bar ν_e$出现以及$ν_μ$和$\bar ν_μ$消失的振荡进行灵敏测试。此外，中微子模式和反中微子模式的振荡之间的比较将允许在短基线（$Δm^2 > 0.1$ eV $^2$）的轻子扇区CP和CPT破坏的灵敏搜索。
英文摘要：
There is accumulating evidence for a difference between neutrino and antineutrino oscillations at the $\sim 1$ eV$^2$ scale. The MiniBooNE experiment observes an unexplained excess of electron-like events at low energies in neutrino mode, which may be due, for example, to either a neutral current radiative interaction, sterile neutrino decay, or to neutrino oscillations involving sterile neutrinos and which may be related to the LSND signal. No excess of electron-like events ($-0.5 \pm 7.8 \pm 8.7$), however, is observed so far at low energies in antineutrino mode. Furthermore, global 3+1 and 3+2 sterile neutrino fits to the world neutrino and antineutrino data suggest a difference between neutrinos and antineutrinos with significant ($\sin^22θ_{μμ} \sim 35%$) $\bar ν_μ$ disappearance. In order to test whether the low-energy excess is due to neutrino oscillations and whether there is a difference between $ν_μ$ and $\bar ν_μ$ disappearance, we propose building a second MiniBooNE detector at (or moving the existing MiniBooNE detector to) a distance of $\sim 200$ m from the Booster Neutrino Beam (BNB) production target. With identical detectors at different distances, most of the systematic errors will cancel when taking a ratio of events in the two detectors, as the neutrino flux varies as $1/r^2$ to a calculable approximation. This will allow sensitive tests of oscillations for both $ν_e$ and $\bar ν_e$ appearance and $ν_μ$ and $\bar ν_μ$ disappearance. Furthermore, a comparison between oscillations in neutrino mode and antineutrino mode will allow a sensitive search for CP and CPT violation in the lepton sector at short baseline ($Δm^2 > 0.1$ eV$^2$).
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
